https://msrc.microsoft.com/update-guide/vulnerability/CVE-20... - the mitre.org link in my original comment.
I pay attention to all the CVEs daily (or as much as I can). the other one is something found in IPv6 by a research group that allows root level remote code execution by exploiting IPv6 packets, but what I'm getting at is, Windows I'll be trusting, absolutely not if it's going to be playing with this 'Recall' thing.
I'm pro-privacy and I highly feel this Recall system opens up a new attack/exploit vector in new unprecedented ways that I don't even want to begin to imagine. I mean, it reads your screen and recalls everything you've ever done..
Torrent files, pretty much anything. It's not that scary at the moment.
Browsers can do it now. It's an age old 'feature' -> https://github.com/garywill/LAN-port-scan-forbidder
uBlock apparently blocks your browser from reaching out to your LAN though, but; no 'sandbox escapes' needed, just javascript being loaded.
Our browsers could have been exploiting things behind NAT this entire time. Smart TVs, Smart watches, phones, anything pingable on your LAN.
Go here and see it in action: http://samy.pl/webscan/
Maybe if they’re running an HTTP server (which isn’t too uncommon for IoT devices) while allowing the attacker website via CORS (less likely). An IoT device listening for WebSocket or WebRTC connections won’t benefit from CORS, but those are relatively rare and ought to have other mitigations in place.
All your links show is the ability to scan ports, not even read the responses to the fetch() requests made to local IP addresses. That could be useful to an attacker, but a far cry from exploiting any smart device or having the ability to send “outgoing crafted packets” from the browser. You cannot even open arbitrary sockets or craft arbitrary HTTP requests.